| 摘要 |
A diesel engine exhaust particle collection device for collecting, under electrical control, particles (10, 10,...) in an exhaust from diesel engine is disclosed. Corona discarge (9) is generated continuously and in stable fashion around the needle tips (8a), since the electrical field is concentrated at needle tips (8a) of needle electrodes (8), in particular, when high voltage is applied to needle electrodes (8) and deflection electrode (12) from high voltage DC power source (13). Consequently, when diesel engine exhaust passes through it, residual oxygen etc. in the exhaust is ionized, producing positive ions, which are adsorbed on to the carbon particles (10), giving these particles themselves a positive ionic charge. Those of charged carbon particles (10a) which are close to collecting electrode (11) are adsorbed on to the electrode plate of negative-potential collecting electrode (11). On the other hand, charged carbon particles (10a, 10a,...) which are more remote from the electrode plate of collecting electrode (11) are deflected in the direction of collecting electrode (11) (repelled) by deflection electrode (12), and so adsorbed on to negative-potential collecting electrode (11). <IMAGE> |
